CN107179956A - It is layered the internuclear reliable communication method of polycaryon processor - Google Patents
It is layered the internuclear reliable communication method of polycaryon processor Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/544—Buffers; Shared memory; Pipes
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
- G06F15/163—Interprocessor communication
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
- G06F15/163—Interprocessor communication
- G06F15/167—Interprocessor communication using a common memory, e.g. mailbox
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
- G06F15/177—Initialisation or configuration control
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/545—Interprogram communication where tasks reside in different layers, e.g. user- and kernel-space
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Abstract
The internuclear reliable communication method of polycaryon processor is layered the present invention relates to one kind, belongs to communication technical field.Whole intercore communication is divided into five levels and is designed, each level is each responsible for different intercore communication tasks by the present invention according to the analysis to each stage characteristic during multiple nucleus system intercore communication.Unified upper-layer user's intercore communication interface is realized to be connected with flexible bottom hardware；Overcome in existing intercore communication mechanism, upper level applications interface disunity, the narrow defect of the lower hardware scope of application.Meet the demand that reliable intercore communication is carried out under polycaryon processor environment.
Description
Technical field
The present invention relates to communication technical field, and in particular to one kind layering internuclear reliable communication method of polycaryon processor.
Background technology
With continuing to develop for multicore architecture, integrated core number is on the increase on single-chip, has promoted processor to set
Count normal form from centered on calculating to the transfer centered on communication.Communication plan between traditional processor core, is such as based on bus
Communication, the communication based on point-to-point and the communication based on cross bar switch can realize the communication between a small amount of processor core.But
In place of the equal Shortcomings of these schemes：The communication plan of shared bus has complicated hardware structure, and programming difficulty is big, difficult
To realize global synchronization；The communication plan of point-to-point is then difficult to the global broadcast of signal of communication, limits it in multinuclear frame
Application under structure；Reduction, the problem of power consumption is larger is difficult and then there is hardware chip area in the communication plan based on cross bar switch.
What the 2nd phase in 2011 published《Intelligent computer and application》It is " a kind of suitable that middle Li Jing plum, Wang Junfeng, a discrimination are delivered
Answer the design of polycaryon processor intercore communication mechanism " there is provided the method for polycaryon processor intercore communication.Transported by analyzing multinuclear
Process cores, according to the difference of operation task function in process cores, are divided into two classes by row task feature：Control core and calculate core.Root
According to the classification to core, it is proposed that a kind of new intercore communication model, the modeling provides three kinds of different communication ports.With this
Three passages, move to the input/output section of application program from calculating core and control core to improve the utilization rate of multinuclear.
The intercore communication mechanism that document " a kind of design of adaptation polycaryon processor intercore communication mechanism " is proposed, will appoint
Business is only divided into coarseness calculation type and control type task when being divided, it is impossible to cover all application demands.The three of design
Kind of communication port has certain application limitation, it is impossible to preferably adapt to multiple hardwares occasion, scalability with it is portable compared with
Difference, and without unified upper layer application abstraction interface is proposed, be unfavorable for user and use.In addition, not carried out to communication reliability
Fully checking, may have the incomplete situation of communication data.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is：How reliable intercore communication polycaryon processor environment under is realized.
(2) technical scheme
In order to solve the above-mentioned technical problem, the internuclear reliable communication method of polycaryon processor is layered the invention provides one kind,
Comprise the following steps：
The first step：Multi-core communication system is divided into five levels from bottom to up：
Linking layer：A variety of physical link modes are provided for the transport layer for upper strata；
Transport layer：For carrying out url management, the different linking mode for linking layer provides different management services；
Session layer：The session layer-management unified for providing, the connection management and supervision, communication task for realizing session layer is ordered
Name service, mailing address issue and confirm, and the service of address resolution is provided for upper strata api layer；
Api layer：For the address resolution service provided using lower floor's session layer, build unified coffret with it is internuclear
Telecommunication management interface；
Application layer：The coffret and management interface that lower floor's api layer is provided are utilized as user；
Second step：Perform intercore communication initialization flow：
Step 21：The url management of session layer is initialized first, the url management control of transport layer is secondly completed
Initialization, then completes the initialization of transport layer data transfer management；
Step 22：CDMA objects are created, transport layer calling interface is obtained；Connection control object is created, session layer pair is obtained
As；Session layer-management object is created, distal end logic connection is set up；
Step 23：Judge that connection is set up whether to complete, if do not completed, return to step 22, which is re-executed, to be initialized
Journey, otherwise intercore communication initialization procedure terminate；
3rd step：Perform communication target and search flow：
Step 31：Search caller thread and send search request signal to communication daemon thread；The daemon thread that communicates is whole
The daemon thread existed always in individual communication process, for handling all kinds of requests in communication process；
Step 32：Communication daemon thread calls Name Lookup function to scan common local thread and currently known distal end
The local agent thread of thread；If lookup result signal non-NULL, lookup result signal is sent to caller thread is searched, and
The thread of name matching is searched, if not finding the thread of name matching, search request can be put into the lookup of operating system
Queue, and judge whether include "/" in communication target name, if comprising expression communication target is telecommunication target, then adjusts
With long-range search request function, if do not included, represent that communication target is local communication target, then realize communication local, this
Ground communication process is prior art；If finding the thread of name matching, name matching result is sent to by signal and looked into
Caller thread is looked for, if lookup result signal is sky, is directly sent to lookup caller thread and searches return signal, informed
Search caller thread and locally do not find subject thread；
The link processing queue of the long-range search request function scan operation system registry, compares the name of link processing
It is whether consistent with the part before "/", if unanimously, link search request signal is sent to link processing, to the chain
Processing forward link search request is connect, link processing calls link search request function to be handled, the link search request letter
Number sends name query message to distal end, and correspondence thread is searched in request distal end, if correspondence thread is found in distal end, calls agency
Thread creation function is the thread creation local agent thread, and sends new thread structure letter to communication daemon thread after creation
Number, lookup queue is rescaned by communication daemon thread, if it find that correspondence thread is then specified to the transmission of caller thread is searched
Signal notified, if do not found, notify search caller thread do not find correspondence thread；If it is inconsistent, terminating；
If correspondence thread is not found in distal end, search request is reentered into the lookup queue of operating system, behind
Lookup queue is rescaned when creating new thread, new url again；When creating new thread, if the new thread of name matching, then
Lookup result signal will be sent to caller thread；And when creating new url, then handle to send to search to corresponding new url and ask
Signal is sought, and then searches distal end, if the new thread of nameless matching, is continued waiting for, until there is the new thread of name matching；
4th step：Perform signal of communication transmission flow：
Obtain core signal structure first and judge the type of subject thread, if subject thread is this common ground wire
Journey, then insert signal to be sent in the signal chained list of subject thread, finally by wake up target thread to notify it to receive
Signal；If subject thread is the local agent thread of distal thread, first judge to send whether Hook Function is empty, the transmission
Hook Function is the function for sending signal to local agent thread；
If the transmission Hook Function for agent thread is sky, represent to there is no the hook letter for current local agent thread
Number, then be redirected to url management daemon thread, and calls by url management daemon thread the transfer function of lower floor's transport layer
Send signal to subject thread；Url management daemon thread is one defined in session layer progress url management and guards line
Journey, the logical connection for realizing session layer for user；If for the transmission Hook Function non-NULL of agent thread, by calling
Corresponding Hook Function is to realize that the transfer function for calling lower floor's transport layer sends signal to subject thread；
5th step：Perform signal of communication and receive flow：
Signal is obtained from signal chained list first, if signal chained list is sky, then it represents that current and no signal is sent to this line
Journey, this thread, which will enter, waits wake-up states, and signal chained list is reexamined after being waken up in next time；If signal chained list non-NULL, is obtained
The number of winning the confidence chained list gauge outfit simultaneously judges whether the signal matches with echo signal, and next signal is jumped to again if mismatching
Matching；Signal is removed from chained list if matching, and receives the signal.
Preferably, a variety of physical link modes include unreliable medium linking mode, reliable medium on-link mode (OLM), are total to
Enjoy links mode, and MCAPI on-link mode (OLM)s.
Data Serialization or functions of retransmission are realized preferably for unreliable medium linking mode；For reliable medium
On-link mode (OLM) provides data sectional function；Management and supervision are directly attached for shared drive and MCAPI on-link mode (OLM)s.
(3) beneficial effect
The present invention draws whole intercore communication according to the analysis to each stage characteristic during multiple nucleus system intercore communication
It is divided into five levels to be designed, each level is each responsible for different intercore communication tasks.Realize unified upper-layer user
Intercore communication interface is connected with flexible bottom hardware；Overcome in existing intercore communication mechanism, upper level applications interface is not
It is unified, the narrow defect of the lower hardware scope of application.Meet the demand that reliable intercore communication is carried out under polycaryon processor environment.
Brief description of the drawings
Fig. 1 is communication system functionality block diagram of the invention；
Fig. 2 is communication means initialization flowchart；
Fig. 3 is that communication target searches flow chart；
Fig. 4 is signal of communication transmission flow figure；
Fig. 5 is that signal of communication receives flow chart.
Embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Embodiment is described in further detail.
As shown in figure 1, being layered the internuclear reliable communication method of polycaryon processor, including following step the invention provides one kind
Suddenly：
The first step：Multi-core communication system is divided into five levels from bottom to up：
(1) linking layer
Linking layer provides a variety of physical link modes for the transport layer on upper strata, both can select unreliable medium, such as with
Too net, UDP, can select reliable medium, such as SRIO, TCP again.The also mode such as shared drive, MCAPI is available simultaneously, fits
Application environment for various polycaryon processors.The design of linking layer causes the technology of the present invention to have stronger flexibility and extensive
Adaptability.
(2) transport layer
Transport layer is then responsible for being attached management, and different management services are provided for different linking layer on-link mode (OLM)s.
For unreliable medium, Data Serialization or functions of retransmission can be realized, it is ensured that the integrality of data；For reliable medium,
Data sectional function is then provided with suitable for the larger application scenario of data volume.And then directly enter for shared drive and MCAPI
Row connection management and supervision.By the subdivision of function, corresponding transmission method is provided for the different transmission mediums of bottom.
(3) session layer
Session layer can provide unified session layer-management, mainly realize the connection management of session layer and supervision, communicate and appoint
It is engaged in naming service, mailing address issue and confirming, and the service of address resolution is provided for upper strata api layer.
(4) api layer
Api layer utilizes the address resolution service that lower floor's session layer is provided, and constructs unified coffret and leads to internuclear
Believe management interface.User is allowd pellucidly to realize the intercore communication between polycaryon processor by application layer, without examining
That considers other layers implements details, it is easy to the use of user.
(5) application layer
User utilizes the coffret and management interface that lower floor's api layer is provided, and can easily design and realize oneself
Application program, complete polycaryon processor intercore communication.
Second step：Communication initialization：
Fig. 2 is to be layered the flow chart that intercore communication is initialized.It is divided into three steps：
Step one：It is that the quick links of session layer are managed to initialize first, secondly completes chain adapter of transport layer
Reason control initialization, then completes the initialization of transport layer data transfer management (hardware is related)；
Step 2：CDMA objects are created, transport layer calling interface is obtained；Connection control object is created, session layer pair is obtained
As；Session layer-management object is created, distal end logic connection is set up；
Step 3：Judge that connection is set up whether to complete, if do not completed, return to step two, which is re-executed, to be initialized
Journey, otherwise intercore communication initialization procedure terminate.
3rd step：Communication target is searched, as shown in figure 3,
(1) perform and search caller thread, (be that exist always in whole communication process one keeps to communication daemon thread
Thread is protected, is responsible for all kinds of requests in processing communication process, is a system-level thread) transmission search request signal, and by
Communication daemon thread calls search request function to be handled.
(2) communication daemon thread is performed, calls Name Lookup function to scan common local thread and currently known remote
The local agent thread of end line journey.If lookup result signal non-NULL, the thread that can be searched to request searches caller line
Journey sends lookup result signal, and searches the thread of name matching, if not finding the thread of name matching, and will can search please
The lookup queue for being put into operating system is asked, and judges whether (be used to distinguish and locally, remotely lead to comprising "/" in communication target name
Believe target), if comprising expression communication target is telecommunication target, then long-range search request function is called, if do not wrapped
Contain, represent that communication target is local communication target, then realize communication local, local communication process is prior art；If looked for
To the thread of name matching, then name matching result is sent to lookup caller thread by signal.If lookup result is believed
Number for sky, then directly to search caller thread send search return signal, inform lookup caller thread do not finding locally
Subject thread.
(3) the link processing queue (chained list) of the long-range search request function scan operation system registry, compares link
Whether the name of processing is consistent with the part before "/", if unanimously, link search request letter is sent to link processing
Number, link search request to the link processing forward.Link processing calls link search request function to be handled, and the link is looked into
Request function is looked for send name query message to distal end, correspondence thread is searched in request distal end, if correspondence thread is found in distal end,
It is the thread creation local agent thread to call agent thread to create function, and sends new line to communication daemon thread after creation
Journey builds signal, and lookup queue is rescaned by communication daemon thread, if it find that correspondence thread is then to lookup caller thread
Send the signal specified to be notified, if do not found, notify that searching caller thread does not find correspondence thread；If differed
Cause, then terminate.
(4) if correspondence thread is not found in distal end, search request is reentered into the lookup queue of operating system, behind
Lookup queue is rescaned when creating new thread, new url again；When creating new thread, if the new thread of name matching, then
Lookup result signal will be sent to caller thread；And when creating new url, then handle to send to search to corresponding new url and ask
Signal is sought, and then searches distal end, if the new thread of nameless matching, is continued waiting for, until there is the new thread of name matching.
4th step：Signal of communication is sent, as shown in figure 4,
Send subsystem and call the type for obtaining core signal structure first and judging subject thread：
(1) if subject thread is common local thread, signal to be sent is inserted to the signal chained list of subject thread
In, finally by wake up target thread with notify its receive signal；
(2) if subject thread is the local agent thread of distal thread, first judge to send whether Hook Function is empty.Institute
It is the function for sending signal to local agent thread to state and send Hook Function；
If the transmission Hook Function for agent thread is sky, then it represents that there is no the hook for current local agent thread
Subfunction, it is necessary to be redirected to url management daemon thread (be session layer carry out url management defined in a daemon thread,
Logical connection for realizing session layer for user), and manage the biography that daemon thread calls lower floor's transport layer by quick links
Defeated function sends signal to subject thread；
If for the transmission Hook Function non-NULL of agent thread, by calling corresponding Hook Function to be called to realize
The transfer function of lower floor's transport layer sends signal to subject thread.
5th step：Signal of communication is received, as shown in figure 5,
(1) receiving subsystem is called obtains signal from signal chained list first, if signal chained list is sky, then it represents that currently simultaneously
No signal is sent to this thread (subject thread), and this thread, which will enter, waits wake-up states, and letter is reexamined after being waken up in next time
Number chained list；
(2) if signal chained list non-NULL, obtain signal chained list gauge outfit and judge whether the signal matches with echo signal, such as
Fruit mismatch then jumps to next signal and matched again；Signal is removed from chained list if matching, and signal is returned
To thread to be received.
As can be seen that the present invention is by by communication process hierarchical design between processor core so that the rank of each in communication process
Duan Gengjia generalities, it is easy to which user, which understands, uses and provided the user a kind of reliable communication method between cores.Towards bottom institute
The linking layer taken out, supports the reliable and non-various transmission mediums for being reliably connected, supporting current main-stream so that present invention tool
There is high reusability；Transparent, unified system call interfaces are then provided for upper-layer user, it is easy to which user is understood with making
With；Intermediate conveyor layer then plays software and hardware with the design of session layer and is connected effect, can be different on the basis of different hardware
Operating system and user's request provide expansible intercore communication service.
Using the method for the layering internuclear reliable communication of multinuclear designed by the present invention, in embedded OS and multinuclear
Under DSP environment, communication test is carried out according to 500 bytes to 4 kbytes of data amounts, result of the test shows, designed is internuclear logical
The communication of letter method is time-consuming to disclosure satisfy that requirement of real-time, and communication is time-consuming stable, shows that the present invention is stable with higher communication
Property；Do not occur event of data loss by testing repeatedly, show that the present invention has high reliability.In application layer user application
In development process, it is only necessary to which whole intercore communication process can be built by calling each system to call, it is easy to which user uses, with height
Availability.For different bottom hardwares there is provided a variety of expansion interfaces, the connection between a variety of multiple nucleus systems is realized, is had
Stronger scalability.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these improve and deformed
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. one kind layering internuclear reliable communication method of polycaryon processor, it is characterised in that comprise the following steps：
The first step：Multi-core communication system is divided into five levels from bottom to up：
Linking layer：A variety of physical link modes are provided for the transport layer for upper strata；
Transport layer：For carrying out url management, the different linking mode for linking layer provides different management services；
Session layer：The session layer-management unified for providing, the connection management and supervision, communication task name for realizing session layer takes
Business, mailing address issue and confirm, and the service of address resolution is provided for upper strata api layer；
Api layer：For the address resolution service provided using lower floor's session layer, unified coffret and intercore communication is built
Management interface；
Application layer：The coffret and management interface that lower floor's api layer is provided are utilized as user；
Second step：Perform intercore communication initialization flow：
Step 21：The url management of session layer is initialized first, the url management control for secondly completing transport layer is initial
Change, then complete the initialization of transport layer data transfer management；
Step 22：CDMA objects are created, transport layer calling interface is obtained；Connection control object is created, session layer object is obtained；Wound
Session layer-management object is built, distal end logic connection is set up；
Step 23：Judge that connection is set up whether to complete, if do not completed, return to step 22 re-executes initialization procedure, no
Then intercore communication initialization procedure terminates；
3rd step：Perform communication target and search flow：
Step 31：Search caller thread and send search request signal to communication daemon thread；Communication daemon thread is whole logical
The daemon thread existed always during letter, for handling all kinds of requests in communication process；
Step 32：Communication daemon thread calls Name Lookup function to scan common local thread and currently known distal thread
Local agent thread；If lookup result signal non-NULL, lookup result signal is sent to caller thread is searched, and search
Search request, if not finding the thread of name matching, can be put into the lookup queue of operating system by the thread of name matching,
And judge whether include "/" in communication target name, if comprising expression communication target is telecommunication target, then calls remote
Journey search request function, if do not included, represents that communication target is local communication target, is then communicated in local realize, local logical
Letter process is prior art；If finding the thread of name matching, name matching result is sent to lookup by signal and adjusted
User's thread, if lookup result signal is sky, directly sends to lookup caller thread and searches return signal, inform lookup
Caller thread is not locally finding subject thread；
The long-range search request function scan operation system registry link processing queue, compare link processing name and
Whether the part before "/" is consistent, if unanimously, link search request signal is sent to link processing, to the link
Processing forward links search request, and link processing calls link search request function to be handled, the link search request function
Name query message is sent to distal end, correspondence thread is searched in request distal end, if correspondence thread is found in distal end, calls and acts on behalf of line
It is the thread creation local agent thread that journey, which creates function, and is believed after creation to communication daemon thread transmission new thread structure
Number, lookup queue is rescaned by communication daemon thread, if it find that correspondence thread is then specified to the transmission of caller thread is searched
Signal notified, if do not found, notify search caller thread do not find correspondence thread；If it is inconsistent, terminating；
If distal end do not find correspondence thread, search request is reentered into the lookup queue of operating system, behind create again
Lookup queue is rescaned when building new thread, new url；, then will be to if the new thread of name matching when creating new thread
Caller thread sends lookup result signal；And when creating new url, then handled to corresponding new url and send search request letter
Number, and then distal end is searched, if the new thread of nameless matching, is continued waiting for, until there is the new thread of name matching；
4th step：Perform signal of communication transmission flow：
Obtain core signal structure first and judge the type of subject thread, if subject thread is common local thread,
By in the signal chained list of signal insertion subject thread to be sent, finally by wake up target thread to notify its to receive signal；
If subject thread is the local agent thread of distal thread, first judge to send whether Hook Function is empty, the transmission hook
Function is the function for sending signal to local agent thread；
If the transmission Hook Function for agent thread is sky, represent to there is no the Hook Function for current local agent thread,
Url management daemon thread is then redirected to, and calls the transfer function of lower floor's transport layer to believe by url management daemon thread
Number it is sent to subject thread；Url management daemon thread is a daemon thread defined in session layer progress url management, is used
In the logical connection that session layer is realized for user；If corresponding by calling for the transmission Hook Function non-NULL of agent thread
Hook Function to realize that the transfer function for calling lower floor's transport layer sends signal to subject thread；
5th step：Perform signal of communication and receive flow：
Signal is obtained from signal chained list first, if signal chained list is sky, then it represents that current and no signal is sent to this thread, this
Thread, which will enter, waits wake-up states, and signal chained list is reexamined after being waken up in next time；If signal chained list non-NULL, obtains signal
Chained list gauge outfit simultaneously judges whether the signal matches with echo signal, and jump to next signal if mismatching matches again；
Signal is removed from chained list if matching, and receives the signal.
2. the method as described in claim 1, it is characterised in that a variety of physical link modes include unreliable medium linking
Mode, reliable medium on-link mode (OLM), shared drive on-link mode (OLM), and MCAPI on-link mode (OLM)s.
3. the method as described in claim 1, it is characterised in that for unreliable medium linking mode realize Data Serialization or
Person's functions of retransmission；Data sectional function is provided for reliable medium on-link mode (OLM)；It is straight for shared drive and MCAPI on-link mode (OLM)s
Tap into row connection management and supervision.
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